<template>
  <ul ref="groupRef">
    <li v-for="group in data" :key="group.title" class="group">
      <h2 class="title">{{ group.title }}</h2>
      <ul>
        <li
          v-for="item in group.list"
          :key="item.id"
          class="item"
          @click="onItemClick(item)"
        >
          <img class="avatar" v-lazy="item.pic" />
          <span class="name">{{ item.name }}</span>
        </li>
      </ul>
    </li>
  </ul>
  <div class="fixed" v-show="fixedTitle" :style="fixedStyle">
    <div class="fixed-title">{{ fixedTitle }}</div>
  </div>
  <div
    class="shortcut"
    @touchstart.stop.prevent="onShortcutTouchStart"
    @touchmove.stop.prevent="onShortcutTouchMove"
    @touchend.stop.prevent
  >
    <ul>
      <li
        v-for="(item, index) in shortcutList"
        :key="item"
        :data-index="index"
        class="item"
        :class="{ current: currentIndex === index }"
      >
        {{ item }}
      </li>
    </ul>
  </div>
</template>

<script>
export default {
  name: 'index-list',
  props: {
    data: {
      type: Array,
      // eslint-disable-next-line space-before-function-paren
      default() {
        return []
      }
    }
  }
}
</script>

<style lang="scss" scoped>
.index-list {
  position: relative;
  width: 100%;
  height: 100%;
  overflow: hidden;
  background: $color-background;
  .group {
    padding-bottom: 30px;
    .title {
      height: 30px;
      line-height: 30px;
      padding-left: 20px;
      font-size: $font-size-small;
      color: $color-text-l;
      background: $color-highlight-background;
    }
    .item {
      display: flex;
      align-items: center;
      padding: 20px 0 0 30px;
      .avatar {
        width: 50px;
        height: 50px;
        border-radius: 50%;
      }
      .name {
        margin-left: 20px;
        color: $color-text-l;
        font-size: $font-size-medium;
      }
    }
  }
  .fixed {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    .fixed-title {
      height: 30px;
      line-height: 30px;
      padding-left: 20px;
      font-size: $font-size-small;
      color: $color-text-l;
      background: $color-highlight-background;
    }
  }
  .shortcut {
    position: absolute;
    right: 4px;
    top: 50%;
    transform: translateY(-50%);
    width: 20px;
    padding: 20px 0;
    border-radius: 10px;
    text-align: center;
    background: $color-background-d;
    font-family: Helvetica;
    .item {
      padding: 3px;
      line-height: 1;
      color: $color-text-l;
      font-size: $font-size-small;
      &.current {
        color: $color-theme;
      }
    }
  }
}
</style>
